What is this?

So I ovulated June 20th, I felt the mild cramp like feeling on my right side and everything which is how I knew i was ovulating. My last period ended June 13th. My bf and I BD 4 times during my fertile period one being the day before and day of my suspected ovulation. I’ve been experiencing very mild cramp like feelings since the 23rd of this month and my period isn’t til July 4th. Of all my years of living since I first got my period I’ve never had light cramping or cramping at all 10-12 days before the start of my period. The cramps have been happening at random throughout the day everyday since the 23rd. I’ve also been experiencing lower back cramp like feelings. I don’t want to get my hopes up of possibly being pregnant but nothing else makes sense. I’ve asked several girls when they get their cramps usually and most have said a day before or on their period day, and that’s same with me... what do you all think it could be?